NUMERICAL EVALUATION OF INTERACTION PHENOMENON BY USING WAKE OSCILLATOR MODEL

This paper presents numerical evaluation on interaction mechanism between three-dimensional square prism and wake. The purpose of this discussion is to propose numerical model for the simulation of vortex-induced oscillation or aerodynamic instability such as galloping. New parameter related to wake stagnation point in the averaged wake field obtained by PIV (Particle Image Velocimetry) measurement was introduced on the modification of the past wake-oscillator model. The result of numerical analysis by the proposed model showed that it was agreeable with the result of past wind tunnel experiment and it can be applicable to the condition of not only uniform flow but also turbulent flow.